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| author | Alok Kataria <akataria@vmware.com> | 2008-11-03 11:18:47 -0800 |
|---|---|---|
| committer | Ingo Molnar <mingo@elte.hu> | 2008-11-04 09:55:26 +0100 |
| commit | 70de9a97049e0ba79dc040868564408d5ce697f9 (patch) | |
| tree | a1bad7a88e347ecac20313e0a852ae1e4c82b63e /arch | |
| parent | 73557af5bf32c3db973050de1fb73423e8fc873e (diff) | |
| download | blackbird-op-linux-70de9a97049e0ba79dc040868564408d5ce697f9.tar.gz blackbird-op-linux-70de9a97049e0ba79dc040868564408d5ce697f9.zip | |
x86: don't use tsc_khz to calculate lpj if notsc is passed
Impact: fix udelay when "notsc" boot parameter is passed
With notsc passed on commandline, tsc may not be used for
udelays, make sure that we do not use tsc_khz to calculate
the lpj value in such cases.
Reported-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
Signed-off-by: Alok N Kataria <akataria@vmware.com>
Cc: <stable@kernel.org>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/x86/kernel/tsc.c | 8 |
1 files changed, 4 insertions, 4 deletions
diff --git a/arch/x86/kernel/tsc.c b/arch/x86/kernel/tsc.c index 62348e4fd8d1..2ef80e301925 100644 --- a/arch/x86/kernel/tsc.c +++ b/arch/x86/kernel/tsc.c @@ -813,10 +813,6 @@ void __init tsc_init(void) cpu_khz = calibrate_cpu(); #endif - lpj = ((u64)tsc_khz * 1000); - do_div(lpj, HZ); - lpj_fine = lpj; - printk("Detected %lu.%03lu MHz processor.\n", (unsigned long)cpu_khz / 1000, (unsigned long)cpu_khz % 1000); @@ -836,6 +832,10 @@ void __init tsc_init(void) /* now allow native_sched_clock() to use rdtsc */ tsc_disabled = 0; + lpj = ((u64)tsc_khz * 1000); + do_div(lpj, HZ); + lpj_fine = lpj; + use_tsc_delay(); /* Check and install the TSC clocksource */ dmi_check_system(bad_tsc_dmi_table); |
